Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Basic and diluted earnings per share

Basic and diluted earnings per share has been computed based on the following:

	Years ended
(Dollars in thousands, except per share data)	December 31, 2015		December 31, 2014	December 31, 2013
Net income available to common stockholders, basic and diluted	$	116,127	112,755	95,644
Average outstanding shares - basic	75,542,455		74,641,957	73,191,713
Add: dilutive stock options and awards	53,126		45,358	68,565
Average outstanding shares - diluted	75,595,581		74,687,315	73,260,278
Basic earnings per share	$	1.54	1.51	1.31
Diluted earnings per share	$	1.54	1.51	1.31